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Journal of Kermanshah University of Medical Sciences
Peer-reviewed Medical Quarterly
e-ISSN 2588-2570
p-ISSN 2588-2562
Noise Emitted from Motorcycle Exhaust and its Control
Authors
1Iran
Published online:Jun 19, 2008
Article type:Research Article
Received:Dec 02, 2007
Accepted:Jun 24, 2008
How to Cite:Khavanin A, Hajiazimi A, Asilian Mahabadi H, Mortazavi B, Soleimanian A, et al. Noise Emitted from Motorcycle Exhaust and its Control. J Kermanshah Univ Med Sci. 2008;12(1):e80107. doi:
Abstract
Introduction: During the thirty years ago noise pollution increased quickly in the urbane communities that motorcycles are chief sources of noise. The objective of this study is reduction of noise emitted from motorcycle exhaust, applying engineering design.
Materials and Methods: In this pre-experimental study, current condition of noise emitted from motorcycle exhaust and physical parameters of exhaust gas is determined and measured again after planning. In this study JIS D 1616 and SAE J1287 are used for noise measurement and JIS B 8006 and JIS B 8007 respectively for pressure and temperature measurement of exhausted gas from Honda CG125 type of motorcycle. For noise, temperature and pressure measurement of exhausted gas, cell 490 sound level meters, ordinary mercury thermometer, pitot tube and inclined manometer were used respectively.
Results: In this motorcycle, in the natural rpm (3000 rpm), Noise level emitted from current silencer was 97.74 dBC and in type 2 reduced to 94.54 dBc. In the natural rpm (3000 rpm) insertion loss of current silencer in 100-400 HZ was equal to 10.94 dB and by engineering planning this parameter reached to 14.22 dB.
Conclusion: For reduction of noise emitted from motorcycle exhaust it is better to use reflective and simple silencer
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© 2008, Journal of Kermanshah University of Medical Sciences. This open-access article is available under the Creative Commons Attribution-NonCommercial 4.0 (CC BY-NC 4.0) International License (https://creativecommons.org/licenses/by-nc/4.0/), which allows for the copying and redistribution of the material only for noncommercial purposes, provided that the original work is properly cited.
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